well, the interesting point is tamils are engaging with punjabis and bengalis are engaging with marwaris in some ways whatever the reasons (mainly due to globalization phenomena though) be that was not observable in past. People here are getting acquainted with the concept of nation and pan national spirit through conflicts and common interests. Political parties of current times are opportunist and survive on short term. What is happening in India is a Hindu awakening and it has a brown Hindu resurrection to it to include people on that basis by pitting it against the groups bordering and elsewhere. It leads to big refined nation state rearrangement which must be the consequence of past that is made of barbaric ways.